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Yanay gets a lot of spam calls. An area code is defined to be a three digit number from 200-999 inclusive. In reality, many of these area codes are not in use, but for this question we'll simplify things and assume they all are. **Throughout these questions, you should assume that Yanay's area code is 781\.\**

User Zavaz
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4 votes

Answer:

Determine the usable area codes.

Step-by-step explanation:

The best way will be the installation of an antispyware software in the mobile phone to identify the source of the call.

User KevB
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